The best possible core clock speed/memory speed I was able to wring from this GPU was a solid 2050MHz to 2063MHz under load at the maximum reported temperatures. If I could keep the core temperature another 10 آ°C cooler, the card will run at 2126MHz all day long. Overclocking would not be used if it did not have an added benefit. With stock speeds on the GTX 1070 Founders Edition offering GTX Titan X performance for a fraction of the cost, you can do even better than Titan X performance in many games.